What do you think about people joining our game temporarily as enemies?
I mean there could be a setting in the menu to allow "guest enemies" to request joining and for example random people from the community could join our game, however not as a companions, but they would replace the AI in a battle? So not like an arena, but like a guest during our story progression in a normal battle.
Sounds like a potential interesting feature for streaming - overall, I feel D:OS1&2 are more fun to watch someone play and play oneselves. Personally, I don't want randos in my game - I like to immerse myself in an RPG, and generally multiplayer features go against that. But as a fully optional feature (something you can turn off) I don't see a harm in that.
That said, I think PvE and PvP encounters need to be designed in different ways. There is no way an AI can emulate thinking of a real player, therefore encounters need to be to some extend asymmetrical. Enemies need to behave in semi-predictable way, and they will usualy need an advantage in power to pose a threat. If you give a life opponent control of those units I think player might end up in a real disadvantage. Some games tried it before (Total War series I think). I don't know how it turned out.
